εἰ γὰρ ὤφελον

From LSJ

Ζεὺς οἶδε μοῖράν τ' ἀμμορίην τ' ἀνθρώπων → Zeus knows what is man's fate and what is not, Zeus knows man's good and bad fortune

Source

Greek > English (Woodhouse)

referring to a past wish